碳化葡萄糖对钛酸钡复合压电纳米发电机的影响和性能研究

Effect of glucose carbide on barium titanate composite piezoelectric nanogenerator and its performance

针对压电纳米发电机低电压和低功率问题,提出利用葡萄糖碳化对钛酸钡进行改性,以增强其压电性能。将葡萄糖包覆在钛酸钡表面后进行碳化,在钛酸钡表面形成碳壳,与P(VDF-TrFE)复合后利用流延法制得复合膜,经干燥、喷金、封装、极化等步骤制得BT@C/P(VDF-TrFE)柔性复合压电纳米发电机。对制得的BT@C/P(VDF-TrFE)复合膜进行微观形貌和元素分布测试;分析不同浓度葡萄糖和不同粉体含量的BT@C/P(VDF-TrFE)柔性压电纳米发电机输出性能差异,并对最佳组分制备的柔性压电纳米发电机进行负载、输出稳定性等测试。结果表明,当葡萄糖浓度为0.8M,粉体含量为15%时,BT@C/P(VDF-TrFE)柔性压电纳米发电机性能最佳,在振幅为5mm时,输出电压达到60.1V,电流达到0.85μA,最大输出功率为9.26μW,同时材料具有一定的输出稳定性。

With regard to the problems of low voltage and low power of piezoelectric nanogenerator,it is proposed to modify barium titanate by glucose carbonization to enhance its piezoelectric properties.Glucose is coated on the surface of barium titanate and carbonized.A carbon shell is formed on the surface of barium titanate,which is then compounded with P(VDF-TrFE)and a composite film is prepared by tape casting.BT@C/P(VDF-TrFE)flexible composite piezoelectric nanogenerator is prepared after the film is dried,sprayed with gold,encapsulated and polarized.The microstructure and element distribution of BT@CP(VDF-TrFE)composite film are tested.The output performance of BT@C/P(VDF-TrFE)flexible piezoelectric nanogenerator with different glucose concentrations and powder contents is analyzed.The load and output stability of the flexible piezoelectric nanogenerator prepared with the best component are tested.The results show that when the glucose concentration is 0.8M and the powder content is 15%,BT@C/P(VDFTrFE)flexible piezoelectric nanogenerator has the best performance.When the amplitude is 5mm,the output voltage reaches 60.1V,the current reaches 0.85Μa,and the maximum output power is 9.26μW.At the same time,the material has a certain degree of output stability.